getcwd(3) is not defined by ANSI C but by 1003.1; pointed out by Alan Curry

in PR lib/4238.

lib/libc/gen/getcwd.3

@@ -1,4 +1,4 @@
-.\"	$NetBSD: getcwd.3,v 1.6 1995/07/30 06:05:35 jtc Exp $
+.\"	$NetBSD: getcwd.3,v 1.7 1997/10/08 09:28:01 kleink Exp $
 .\"
 .\" Copyright (c) 1991, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -137,7 +137,7 @@ The
 .Fn getcwd
 function
 conforms to
-.St -ansiC .
+.St -p1003.1-90 .
 The ability to specify a
 .Dv NULL
 pointer and have